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Plate Tectonics


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18                       19            

2.Transfer of heat through the movement of a fluid material
4.System of undersea mountain ranges that wind around the earth
7.Deep valley in th ocean floor that forms along a subduction zone
10.Movement in a fluid caused by uneven heat
11.Material that makes up landmasses
15.Boundary formed by two lithospheric plates that are moving apart
16.Giant ocean surrounding Pangaea
17.Thin outer shell of the earth consisting of the crust and the ridge upper mantel
18.Material that makes up the ocean floor
19.Piece of land with a geologic history distinct from that of the surrounding land
1.Undersea mountian range with a steep, narrow valley along its center
2.Border formed by the direct collision of two lithospheric plates
3.Theory that the lithosphere is made up of plates that float on the asthenosphere
5.Region where one lithosphere plate moves under another
6.Movement of the ocean floor away from either side of a mid-ocean ridge
8.Hypothesis stating that the continents once formed a single landmass
9.Single landmass thought to have been the origin of all continent
12.Zone of mantel beneath the lithosphere that consists of slowly flowing solid rock
13.Chain of volcanic islands formed along an ocean trench
14.Steep, narrow valley formed as lithospheric plates seperate

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